Thomas l



(No Model.)

T. L. WLLSON. www@ Mmmm 1N mm UF GRYSTALLNE CALCIUM GARBIDB. .K

310,541,138, @mmm June18,1895.`

Y fs;

PAT-ENT @rincer THOMAS L. WILLSONfOF NEW YORK, N.

iRl-)UT EXiSTlNG iii FORMOF CRYSTALLINE CALCIUM CARBlD TEQHICATIDH forming part of Letters Esterni: o. 'M1-,13.8, cated' Tune 18, 1895.

Application lacl Karcn 4, 1895. Eesl Ho. 540,458. (No specimens.) l

.To ail wom i?? may concern.- 33e-.it known tbs-t i; THOMAS L. WILLsoN, o 'the city, county, und State of NewYork, have. invenied c. new anni useful Product Existing in lle Forro. of Crystalline Calcium Carbide, of vision ille following is c. full, true, .and ex* ect descripiion, reference being had to the accompanying-crawling, i

This inveniion relates to tiie production of e. new form ci crystalline clciuln carbide.

Before any invention calcium carbide has exisied en croisons condition, d ue either to the meibcci ci its prepare-Gon, cr to iieinipuribies contained in ii.

my icrenicn herein described, calcium carbide is profiuceii .in a new forznmamely, in cryscliine confliion, boi/ing e. bluish or purpiish irriesceuoe. The carbide so existing is in a. condition pa-riicnlcrly applicable, on ec const of its periiy, t'or conversion into other compounds. Y In order to produce ibis product, prccee es follows: l sire Very finely divided colte and lime, mcoirsniccliyrsucod to e. pljilverulen conition, snai .i mingle them boroughly mechanically .in the proportion of thirty-five per cout. of coke scrl sixty-ire per conn. of linie. tiren subject tbein io ii e action of the cieciric curr-ent in e furnace, euch as that shown in tbe occoinbeuying i1-swing, whichA is e ver- `tical section, euri in which- A represents en inolosing brick work; B, an inter-ncl lining, preferably. of carbon, which, though preferable, is not in ali cases necessary; ono ci the conducting polesby prefercnce of broken carbon; lle. removable polo ci compacted. carbon; Re iep hole vfor 'remcring cbc melesiproiicet,idesire;- Fiasjusting mechanism for raising tbe carbon pole'D, and G en alternating currentv dynamo, which may, therefore, be mede' commutatorless.

' in starting 1giiis furnace, the carbon pole D and the conducting bodies C .are connected to also poles of en alternating current dynamo having?. meen potentiel, ssyof fty-five volts,

y ansi smcieniamperege toproduce theamount of materiel required, 23a-'ving regard to the size of. the furnace. Using, -for instance, s

pole having eight inches on tbe side, an am-A prage of about fifteen hundred is desirable. Under these conditions, by reason of the altematico of the current, a, feeding in of tbe mingled lime and carbon between the poles'is effected to an extent which does not occur when a directcurrent is used. Furthermore, it has been generally understood that the production of calcium carbide wasgdue toan. ciectroiytic action vand not due to a smelting aeton. have demonstrated that the action is purely a sm'cltiug action, u oder th e conditions of the process here described. Furthermore,

that the block of molten calcium carbide which forms beneathvthe elevatingvpoie is itselm. good conductor of electricity and css be built; up from the ybottom io any desired height without preventing the operation of the process. A height, for instcuce, of two or more feet is entirely practicable in the ap- Aperritos above described. If preferred, of .course the fused calcium carbide may be tapped out as the same is formati, in the ordinary way, as applied to iron and steel. The

liquid calcium carbide thus produced, whenallowed to cool, crystallizes v above described, und when broken exhibits the iridescentsurfaces above named. By

into ibo .forro tins yprocess, likewise, the. yield-of cslcium carbide. per electric horse power is almost doubied'over a process of using a direct currenwhich is, evidently, amatter of the utmost'importnncqwhiie, at the same time,the process proceeds uniformly and without break, by reason of the substsnial uniform feeding in orffthe material.

nIt is essential, in orderto produce ihenew material here described, to have the lime and coke very finely divided'. This is done by s powderiug machine, and then the powdered lime and -coke are thoroughly mingled by a grinder or mixer so as to bring these bodies into most intimate contact. The action of the alternating current is likewise essentially dierent 'from that of a direct current, producing a series of explosions, the eiec; of

which seems to be to feed thepuiverized maf.

terlaLinto the arc. This is very important in accomplishing a rapid and uniform'convername to this pecitlotion in the presence of n:

sien.

What Iclaim as xii);v inviention,"andfdere' 5fto secure by Letters Patent, is-

. As a new product, crystalline calcium can bide existing as masses o! aggregated crystals, -stxbstantially asvdescribed. i

In testimony whereof I hve signed my two subscribing witn ossee.

THOMAS L. WILLSGN, 4

.#Witnesses: A

H. COUTANT,

, ANTHONY GEEF. 

